Old world is dead. A
catastrophe of forgotten origin had wiped the old civilization out. Ice
age came after. And then - a thaw, when water level rised tremendously
and even ancient icebergs began to melt. People of this post-ice age
are peaceful and remember very little of their history. They can only
guess what it was like by the 'gifts' - objects and creatures brought
to their shores by wandering icebergs each spring. Sometimes these
'gifts' are dangerous, or even alive....